Hi Rohit, I am going through the same steps as you. I am interested and fascinated with commodities and the best way to go about it is to read and watch the market.
Read about futures and options and forwards and understand their implications for risk, leverage, delivery, sale etc... Look at the months on each of the commodities
January F July N
February G August Q
March H September U
April J October V
May K November X
June M December Z
these are for physical delivery.
Choose the commodities you want to trade there are hundreds and each have particual characteristcs affecting their price and volatility. Look at precious and base metals, softs, oil etc... Try and be specific and learn about one or two correlated commodities to begin with and then expand in the future. As for strategy the best thing to do is educate yourself, jot down a trading plan and move to a demo account or CFD provider and play with that. As you become more knowledgeable the steps will be more obvious.
Here are a few links to start you off
How to Trade Commodities ezine
Commodity Profiles
Futures contract - Wikipedia, the free encyclopedia
There are a couple of good books you can get your hands on but I suggest you read these and get a better idea.